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swoodx10
2001-Nov-25, 04:01 AM
I ran across a small newspaper article a month or so ago about the possibility of moving Earth into a larger/different orbit by managing the paths of comets or asteroids. Does anyone know the whereabouts of that actual article, or other sources of information regarding this idea?
Thanks,
sw

Torsten
2001-Nov-25, 05:06 AM
I recall this idea being discussed at the old board a few months ago.

There was a paper by Don Korycansky (http://www.ucolick.org/~kory/) and others in Astrophysics and Space Science, 275, p 349-366. A 20 page PDF version of it can be found here (http://www.ucolick.org/~kory/astro_eng/astro_eng.pdf), and the topic was also discussed in Scientific American (http://www.sciam.com/2001/0601issue/0601scicit6.html) as well as a number of newspapers.

As an aside, there is an obvious typo in the Scientific American article. They write of the 100 km object having a mass of 1016 tons, but I think they mean 10<sup>16</sup> tons. Even so, I think the number is wrong. A 100 km diameter round object with mass 10<sup>16</sup> tons would have a density of around 19 tons/m<sup>3</sup>. Even the density iron is less than half of that. They must have used a 100 km radius when they calculated the mass.

A search at Google on the name "Don Korycansky" will turn up a bunch of info. The url is: http://www.google.com

(Hmmm, edited because it wouldn't accept a hot link to Google without appending a bunch of other stuff to my code -- weird)


<font size=-1>[ This Message was edited by: Torsten on 2001-11-25 00:15 ]</font>